The ratio of the indicated power to the shaft power or brake power of the motor or engine required to drive the compressor, is called Volumetric efficiency Isothermal efficiency Compressor efficiency Mechanical efficiency TRUE ANSWER : ? YOUR ANSWER : ?
Pick up the wrong statement about advantages of multistage compression More loss of air due to leakage past the cylinder Air can be cooled perfectly in between Mechanical balance is better Better lubrication is possible advantages of multistage TRUE ANSWER : ? YOUR ANSWER : ?
If the clearance ratio for a reciprocating air compressor is 'K', then its volumetric efficiency is given by 1 + k - k (p₂/p₁)1/n 1 + k - k (p₂/p₁) n-1/n 1 - k + k (p₁/p₂) n- 1/n 1 - k + k (p₁/p₂)1/n TRUE ANSWER : ? YOUR ANSWER : ?
Compression efficiency is compared against Isentropic compression Isothermal compression Ideal compression Adiabatic compression TRUE ANSWER : ? YOUR ANSWER : ?
The power available for takeoff and climb in case of turbojet engine as compared to reciprocating engine is May be less or more depending on ambient conditions Less Same More TRUE ANSWER : ? YOUR ANSWER : ?
If V, U and Vr represent the absolute velocity of fluid, velocity of blade, and relative velocity of fluid, and suffix ‘I’ and ‘o’ stand for entry and exit conditions, then in a rotary machine whose degree of reaction is unity U < Vo Vt > Vo Vi = Vo V = Uo TRUE ANSWER : ? YOUR ANSWER : ?
To avoid moisture troubles, the compressed air main line should Rise gradually towards the point of use Drop gradually towards the point of use Be laid exactly horizontally Be laid vertically TRUE ANSWER : ? YOUR ANSWER : ?
The work done per unit mass of air in compression will be least when 'n' is equal to 1 1.2 1.3 1.4 TRUE ANSWER : ? YOUR ANSWER : ?
The criterion of the thermodynamic efficiency for rotary compressor is Polytropic compression Isentropic compression Isothermal compression None of the listed here TRUE ANSWER : ? YOUR ANSWER : ?
Which is false statement about advantages of multistage compressor in comparison to single stage compressor? Less loss of air due to leakage past the cylinder Better mechanical balance Less power requirement Lower volumetric efficiency TRUE ANSWER : ? YOUR ANSWER : ?